Here is the full list of all 12 GUNDAM EVOLUTION achievements.
Reach Player Level 50
Reach Gold Rank
Complete all Beginner's Challenges and claim rewards
Reach Silver Rank
Reach Bronze Rank
Get 1,000 kills total and reach (Casual/Ranked) Match Results
Join 10 casual or ranked matches and reach (Casual/Ranked) Match Results
Recover 10 allies total and reach (Casual/Ranked) Match Results
Reach Player Level 10
Get MVP in a Casual or Ranked Match
Get 500 critical hits total and reach (Casual/Ranked) Match Results
Get a 5 player kill streak and reach (Casual/Ranked) Match Results